Ceramaflex is a high performance grade, flexible, dry-set mortar providing 48% higher flexural strength than conventional mortars. It can be used over cracks up to 1/16” (3 mm) and will reduce tile cracking when used on substrates subjected to limited deflection and vibration. Mix with water only. Ceramaflex may be used to bond all types of ceramic, porcelain, stone and glass tile over variety of substrates including exterior grade plywood.